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The Effect Of Transmitter Channel State Information (CSIT ) On The MIMO Capacity Performance

Authors: Ghanim Abd AL Kareem غانم عبد الكريم --- Raad.H.Thaher
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2012 Volume: 16 Issue: 3 Pages: 149-161
Publisher: Al-Mustansyriah University الجامعة المستنصرية

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Abstract

Wireless communication systems employing multiple antennas at both the transmitter and receiver have been shown to offer significant gains over single-antenna systems. It is shown that the ergodic capacity and outage capacity increases linearly with respect to NRNT. It is also shown that the capacity is improved when the channel state information (CSI) is known at the transmitter for MIMO system and for all values of SNR. In this work, MIMO system has been studied in detail and simulated for different cases and concentrated on the capacity performance when the channel state information is known (Water filling ) and when the CSI is unknown to TX (Equal power allocation ).MIMO system was described and simulation results ( using MATLAB computer simulation program) were presented and discussed

أنظمة الاتصالات اللاسلكية التي تستخدم هوائيات متعددة في الارسال والاستقبال أعطت مكاسب كبيرة مقارنة بنظام الهوائي الواحد . وتبين أن استيعاب قدرة اركودك واستيعاب قدرة الانقطاع تزداد خطيا نسبة الى NRNT. وتظهر أيضا أن استيعاب القدرة تتحسين عندما يعرف معلومات حالة القناة (CSI) في الارسال لنظام الإدخال والإخراج المتعدد MIMO system ولكل قيم نسبة الاشارة الى الضوضاء SNR. في هذا البحث نظام MIMO درس بالتفصيل وتم عمل محاكاة لحالات مختلفة تركزت على اداء قدرة الاستيعاب عندما يعرف معلومات حالة القناة تعبئة المياه (Water filling )، وعندما لا يعرف معلومات حالة القناة تخصيص القدرة المتساوي (Equal power allocation ) . لقد تم عرض ومناقشة النتائج لنظام MIMO باستخدام برنامج المحاكاة الحاسوبي MATLAB 2009a .


Article
التنصيص الخطابي وراء ملحمة جلجامش وأبعاده التشكيلية عبر الحضارة العراقية القديمة جوديا وحمورابي أنموذج ا

Authors: أ.د.غساف طه ياسيف --- أ.د.ستي رقية حاج تبؾ --- . جهينه حامد حساني
Journal: Athar alrafedain آثار الرافدين ISSN: 2304103X Year: 2012 Volume: 1 Issue: 1 Pages: 97-116
Publisher: Mosul University جامعة الموصل

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Abstract

The shape has been depicted as one of the most significant civilizational means which functions in human life, in terms of linking “senders” and “receivers” within the art of structural speech. It aims at making an awareness of what lies behind the event more than its apparent narrative, as it focuses more on descriptive manifestations at the expense of the actual content. For that reason, we worked on the re-interpretation of civilization, in accordance with the specialty of art, through its more graphic output, and in the light of the semiotic approach. We examined the structural signs in extremely precise detail of the partials, and then followed its uniform pattern within each single text, thus making way for the whole of the ancient Iraqi civilization in the form of three social reformers (Gilgamesh, Judea, and Hammurabi). These reformers share three works of fine art on the concept of how to maintain life and durability. The resulted concept was decided in favor of a symbolic approach towards good deeds, which were represented as the overall value of a sound life, and agreed upon as a common symbol of world religions, of which Islam is the seal. These various forms of expression are no longer restricted to a certain time, age, or category of people. On the contrary, their influence has expanded to all sorts of expressive fields, to an unlimited extent, as they started at a single point before expanding in accordance with social needs.

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Abstract/The shape has been depicted as one of the most significant civilizational means which functions in human life --- in terms of linking “senders” and “receivers” within the art of structural speech. It aims at making an awareness of what lies behind the event more than its apparent narrative --- as it focuses more on descriptive manifestations at the expense of the actual content. For that reason --- we worked on the re-interpretation of civilization --- in accordance with the specialty of art --- through its more graphic output --- and in the light of the semiotic approach. We examined the structural signs in extremely precise detail of the partials --- and then followed its uniform pattern within each single text --- thus making way for the whole of the ancient Iraqi civilization in the form of three social reformers --- Gilgamesh --- Judea --- and Hammurabi. These reformers share three works of fine art on the concept of how to maintain life and durability. The resulted concept was decided in favor of a symbolic approach towards good deeds --- which were represented as the overall value of a sound life --- and agreed upon as a common symbol of world religions --- of which Islam is the seal. These various forms of expression are no longer restricted to a certain time --- age --- or category of people. On the contrary --- their influence has expanded to all sorts of expressive fields --- to an unlimited extent --- as they started at a single point before expanding in accordance with social needs. --- قُدِّم الشكل على أنه واحد من أهمِّ الوسائل الحضارية الدالّه في حياة الإنسان تواصل خطابه الإنشائي بين مُرِسل، ومرسَل إليه، وهدفه الوعي بما وراء الحدث أكثر من ظاهره السردي

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